The special round of counselling for admission  to the vacant seats of the various NITs IIITs and GFTIs after the JOSAA counselling is conducted by the Central Seat Allocation Board or CSAB. It also conducts a special counselling for north east candidates. The link for it is :-

https://csab.nic.in/cms/Public/Home.aspx

Hello,John

The official website link of CSAB 2019 special round  counselling is given below.

https://csab.nic.in/cms/Public/Home.aspx

Hope this helps.